Alert archive / Texas / San Jacinto County
Weather alerts in San Jacinto County, Texas, 2020
100 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
San Jacinto County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 100
- Warnings
- 22
- Watches
- 15
- Advisories
- 26
- Busiest month
- April35 alerts
- Busiest day
- April 19, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering San Jacinto County in 2020 had a tornado report inside them.
San Jacinto County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 14 | 11 | 21% | 1 | 100% | 25 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Houston/Galveston, TX: tornado warnings | 25 | 5 | 80% | 14 | 86% | 15 min |
| NWS Houston/Galveston, TX: severe thunderstorm warnings | 116 | 53 | 54% | 222 | 79% | 22 min |
| NWS Houston/Galveston, TX: flash flood warnings | 33 | 15 | 55% | 46 | 91% | 54 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 10:53 PM CST | Dense Fog Advisory | HGX | 9 hr |
| Jan 10, 8:49 PM CST | Mesoscale Discussion | SPC | 116 min |
| Jan 10, 9:09 PM CST | Tornado Watch | SPC | 5 hr |
| Jan 10, 11:15 PM CST | Special Weather Statement | HGX | 45 min |
| Jan 10, 11:22 PM CST | Severe Thunderstorm Warning | HGX | 38 min |
| Jan 10, 11:52 PM CST | Severe Thunderstorm Warning | HGX | 38 min |
| Jan 11, 12:21 AM CST | Mesoscale Discussion | SPC | 99 min |
| Jan 11, 12:23 AM CST | Severe Thunderstorm Warning | HGX | 52 min |
| Jan 13, 6:35 PM CST | Dense Fog Advisory | HGX | 15 hr |
| Jan 14, 6:43 PM CST | Dense Fog Advisory | HGX | 13 hr |
| Jan 15, 5:36 PM CST | Dense Fog Advisory | HGX | 16 hr |
| Jan 26, 8:23 PM CST | Dense Fog Advisory | HGX | 15 hr |
| Feb 10, 12:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 20, 8:57 AM CST | River Flood Warning | HGX | 72 hr |
| Mar 4, 7:33 AM CST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 4, 12:01 PM CST | Severe Thunderstorm Warning | HGX | 29 min |
| Mar 4, 12:29 PM CST | Special Weather Statement | HGX | 31 min |
| Mar 22, 3:13 PM CDT | River Flood Warning | HGX | 21 days |
| Apr 8, 2:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 9, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 5:00 PM CDT | Severe Thunderstorm Warning | HGX | 45 min |
| Apr 9, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 9, 5:47 PM CDT | Severe Thunderstorm Warning | HGX | 43 min |
| Apr 12, 1:56 PM CDT | Special Weather Statement | HGX | 49 min |
| Apr 16, 9:28 AM CDT | River Flood Warning | HGX | 10 days |
| Apr 18, 3:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 18, 4:35 PM CDT | Severe Thunderstorm Warning | HGX | 55 min |
| Apr 18, 5:59 PM CDT | Severe Thunderstorm Warning | HGX | 46 min |
| Apr 19, 7:22 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 19, 8:41 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 19, 10:49 AM CDT | Severe Thunderstorm Warning | HGX | 41 min |
| Apr 19, 11:29 AM CDT | Special Weather Statement | HGX | 61 min |
| Apr 19, 12:28 PM CDT | Tornado Warning | HGX | 20 min |
| Apr 19, 12:39 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 19, 2:39 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 3:23 PM CDT | Special Weather Statement | HGX | 52 min |
| Apr 19, 11:05 PM CDT | Dense Fog Advisory | HGX | 9 hr |
| Apr 22, 10:38 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 10:55 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 22, 1:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 22, 4:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 22, 4:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 22, 5:01 PM CDT | Severe Thunderstorm Warning | HGX | 44 min |
| Apr 22, 5:01 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 22, 5:17 PM CDT | Tornado Warning | HGX | 43 min |
| Apr 24, 7:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 24, 8:51 PM CDT | Special Weather Statement | HGX | 39 min |
| Apr 28, 12:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Apr 29, 1:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 29, 2:40 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 29, 2:50 AM CDT | Severe Thunderstorm Warning | HGX | 55 min |
| Apr 29, 3:35 AM CDT | Severe Thunderstorm Warning | HGX | 40 min |
| Apr 29, 4:11 AM CDT | Severe Thunderstorm Warning | HGX | 64 min |
| May 5, 3:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 5:14 AM CDT | Flash Flood Watch | HGX | 26 hr |
| May 22, 4:25 PM CDT | Severe Thunderstorm Warning | HGX | 35 min |
| May 22, 4:29 PM CDT | Areal Flood Advisory | HGX | 61 min |
| May 24, 12:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 24, 2:40 PM CDT | Special Weather Statement | HGX | 65 min |
| May 25, 6:14 AM CDT | River Flood Warning | HGX | 18 hr |
| May 26, 3:51 PM CDT | Special Weather Statement | HGX | 39 min |
| May 26, 4:35 PM CDT | Special Weather Statement | HGX | 40 min |
| May 26, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 27, 1:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 8, 3:08 PM CDT | Heat Advisory | HGX | 28 hr |
| Jun 21, 5:37 PM CDT | Special Weather Statement | HGX | 23 min |
| Jun 23, 12:16 PM CDT | Flash Flood Watch | HGX | 19 hr |
| Jun 23, 7:54 PM CDT | Areal Flood Advisory | HGX | 111 min |
| Jun 23, 9:52 PM CDT | Areal Flood Advisory | HGX | 2 hr |
| Jun 24, 3:03 AM CDT | Areal Flood Advisory | HGX | 3 hr |
| Jun 25, 6:24 AM CDT | Areal Flood Advisory | HGX | 111 min |
| Jul 10, 3:12 AM CDT | Heat Advisory | HGX | 16 hr |
| Jul 10, 3:55 PM CDT | Heat Advisory | HGX | 28 hr |
| Jul 11, 2:44 PM CDT | Heat Advisory | HGX | 29 hr |
| Jul 12, 3:16 PM CDT | Heat Advisory | HGX | 29 hr |
| Jul 13, 3:13 PM CDT | Heat Advisory | HGX | 29 hr |
| Aug 5, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 9, 5:22 PM CDT | Special Weather Statement | HGX | 38 min |
| Aug 9, 6:02 PM CDT | Special Weather Statement | HGX | 58 min |
| Aug 12, 3:05 AM CDT | Heat Advisory | HGX | 5 days |
| Aug 17, 12:57 AM CDT | Special Weather Statement | HGX | 33 min |
| Aug 17, 1:34 AM CDT | Special Weather Statement | HGX | 41 min |
| Aug 24, 3:55 PM CDT | Tropical Storm Watch | HGX | 18 hr |
| Aug 25, 10:04 AM CDT | Tropical Storm Warning | HGX | 48 hr |
| Aug 28, 3:59 AM CDT | Heat Advisory | HGX | 18 hr |
| Aug 28, 3:07 PM CDT | Heat Advisory | HGX | 30 hr |
| Aug 30, 4:13 AM CDT | Heat Advisory | HGX | 40 hr |
| Aug 31, 3:47 PM CDT | Heat Advisory | HGX | 28 hr |
| Sep 3, 2:26 PM CDT | Special Weather Statement | HGX | 49 min |
| Sep 5, 4:03 PM CDT | Areal Flood Advisory | HGX | 73 min |
| Sep 19, 4:28 PM CDT | Flash Flood Watch | HGX | 3 days |
| Oct 21, 4:30 AM CDT | Dense Fog Advisory | HGX | 5 hr |
| Nov 25, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 29, 2:59 PM CST | Freeze Watch | HGX | 12 hr |
| Nov 30, 3:12 AM CST | Freeze Warning | HGX | 29 hr |
| Dec 11, 7:46 PM CST | Dense Fog Advisory | HGX | 7 hr |
| Dec 13, 1:46 PM CST | Mesoscale Discussion | SPC | 119 min |
| Dec 23, 3:00 AM CST | Wind Advisory | HGX | 33 hr |
| Dec 30, 11:29 AM CST | Flash Flood Watch | HGX | 28 hr |
| Dec 30, 4:48 PM CST | Mesoscale Discussion | SPC | 2 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 14 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 15 |
| Flooding | |
| River Flood Warning | 4 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 6 |
| Heat | |
| Heat Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.